Flash Flood Susceptibility Evaluation in Human-Affected Areas Using Geomorphological Methods—The Case of 9 August 2020, Euboea, Greece. A GIS-Based Approach
Flash floods occur almost exclusively in small basins, and they are common in small Mediterranean catchments. They pose one of the most common natural disasters, as well as one of the most devastating. Such was the case of the recent flood in Euboea island, in Greece, in August 2020. A field survey...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | GeoHazards |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2624-795X/2/4/20 |
| _version_ | 1797504206898200576 |
|---|---|
| author | Anna Karkani Niki Evelpidou Maria Tzouxanioti Alexandros Petropoulos Nicoletta Santangelo Hampik Maroukian Evangelos Spyrou Lida Lakidi |
| author_facet | Anna Karkani Niki Evelpidou Maria Tzouxanioti Alexandros Petropoulos Nicoletta Santangelo Hampik Maroukian Evangelos Spyrou Lida Lakidi |
| author_sort | Anna Karkani |
| collection | DOAJ |
| description | Flash floods occur almost exclusively in small basins, and they are common in small Mediterranean catchments. They pose one of the most common natural disasters, as well as one of the most devastating. Such was the case of the recent flood in Euboea island, in Greece, in August 2020. A field survey was accomplished after the 2020 flash floods in order to record the main impacts of the event and identify the geomorphological and man-made causes. The flash flood susceptibility in the urbanized alluvial fans was further assessed using a Geographic Information System (GIS)-based approach. Our findings suggest that a large portion of the alluvial fans of Politika, Poros and Mantania streams are mainly characterized by high and very high hazard. In fact, ~27% of the alluvial fans of Politika and Poros streams are characterized with very high susceptibility, and ~54% of Psachna area. GIS results have been confirmed by field observations after the 2020 flash flood, with significant damages noted, such as debris flows and infrastructure damages, in buildings, bridges and the road networks. In addition, even though the adopted approach may be more time-consuming in comparison to purely computational methods, it has the potential of being more accurate as it combines field observations and the effect of past flooding events. |
| first_indexed | 2024-03-10T04:01:22Z |
| format | Article |
| id | doaj.art-53219099b680485395aa80b399c76a69 |
| institution | Directory Open Access Journal |
| issn | 2624-795X |
| language | English |
| last_indexed | 2024-03-10T04:01:22Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | GeoHazards |
| spelling | doaj.art-53219099b680485395aa80b399c76a692023-11-23T08:32:01ZengMDPI AGGeoHazards2624-795X2021-11-012436638210.3390/geohazards2040020Flash Flood Susceptibility Evaluation in Human-Affected Areas Using Geomorphological Methods—The Case of 9 August 2020, Euboea, Greece. A GIS-Based ApproachAnna Karkani0Niki Evelpidou1Maria Tzouxanioti2Alexandros Petropoulos3Nicoletta Santangelo4Hampik Maroukian5Evangelos Spyrou6Lida Lakidi7Faculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15771 Athens, GreeceFaculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15771 Athens, GreeceFaculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15771 Athens, GreeceFaculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15771 Athens, GreeceDepartment of Earth, Environmental and Resources Sciences, DISTAR, University of Naples Federico II, Via Cinthia 21, 80126 Naples, ItalyFaculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15771 Athens, GreeceFaculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15771 Athens, GreeceFaculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15771 Athens, GreeceFlash floods occur almost exclusively in small basins, and they are common in small Mediterranean catchments. They pose one of the most common natural disasters, as well as one of the most devastating. Such was the case of the recent flood in Euboea island, in Greece, in August 2020. A field survey was accomplished after the 2020 flash floods in order to record the main impacts of the event and identify the geomorphological and man-made causes. The flash flood susceptibility in the urbanized alluvial fans was further assessed using a Geographic Information System (GIS)-based approach. Our findings suggest that a large portion of the alluvial fans of Politika, Poros and Mantania streams are mainly characterized by high and very high hazard. In fact, ~27% of the alluvial fans of Politika and Poros streams are characterized with very high susceptibility, and ~54% of Psachna area. GIS results have been confirmed by field observations after the 2020 flash flood, with significant damages noted, such as debris flows and infrastructure damages, in buildings, bridges and the road networks. In addition, even though the adopted approach may be more time-consuming in comparison to purely computational methods, it has the potential of being more accurate as it combines field observations and the effect of past flooding events.https://www.mdpi.com/2624-795X/2/4/20flash floodimpactsalluvial fansgeomorphologynatural hazard |
| spellingShingle | Anna Karkani Niki Evelpidou Maria Tzouxanioti Alexandros Petropoulos Nicoletta Santangelo Hampik Maroukian Evangelos Spyrou Lida Lakidi Flash Flood Susceptibility Evaluation in Human-Affected Areas Using Geomorphological Methods—The Case of 9 August 2020, Euboea, Greece. A GIS-Based Approach GeoHazards flash flood impacts alluvial fans geomorphology natural hazard |
| title | Flash Flood Susceptibility Evaluation in Human-Affected Areas Using Geomorphological Methods—The Case of 9 August 2020, Euboea, Greece. A GIS-Based Approach |
| title_full | Flash Flood Susceptibility Evaluation in Human-Affected Areas Using Geomorphological Methods—The Case of 9 August 2020, Euboea, Greece. A GIS-Based Approach |
| title_fullStr | Flash Flood Susceptibility Evaluation in Human-Affected Areas Using Geomorphological Methods—The Case of 9 August 2020, Euboea, Greece. A GIS-Based Approach |
| title_full_unstemmed | Flash Flood Susceptibility Evaluation in Human-Affected Areas Using Geomorphological Methods—The Case of 9 August 2020, Euboea, Greece. A GIS-Based Approach |
| title_short | Flash Flood Susceptibility Evaluation in Human-Affected Areas Using Geomorphological Methods—The Case of 9 August 2020, Euboea, Greece. A GIS-Based Approach |
| title_sort | flash flood susceptibility evaluation in human affected areas using geomorphological methods the case of 9 august 2020 euboea greece a gis based approach |
| topic | flash flood impacts alluvial fans geomorphology natural hazard |
| url | https://www.mdpi.com/2624-795X/2/4/20 |
| work_keys_str_mv | AT annakarkani flashfloodsusceptibilityevaluationinhumanaffectedareasusinggeomorphologicalmethodsthecaseof9august2020euboeagreeceagisbasedapproach AT nikievelpidou flashfloodsusceptibilityevaluationinhumanaffectedareasusinggeomorphologicalmethodsthecaseof9august2020euboeagreeceagisbasedapproach AT mariatzouxanioti flashfloodsusceptibilityevaluationinhumanaffectedareasusinggeomorphologicalmethodsthecaseof9august2020euboeagreeceagisbasedapproach AT alexandrospetropoulos flashfloodsusceptibilityevaluationinhumanaffectedareasusinggeomorphologicalmethodsthecaseof9august2020euboeagreeceagisbasedapproach AT nicolettasantangelo flashfloodsusceptibilityevaluationinhumanaffectedareasusinggeomorphologicalmethodsthecaseof9august2020euboeagreeceagisbasedapproach AT hampikmaroukian flashfloodsusceptibilityevaluationinhumanaffectedareasusinggeomorphologicalmethodsthecaseof9august2020euboeagreeceagisbasedapproach AT evangelosspyrou flashfloodsusceptibilityevaluationinhumanaffectedareasusinggeomorphologicalmethodsthecaseof9august2020euboeagreeceagisbasedapproach AT lidalakidi flashfloodsusceptibilityevaluationinhumanaffectedareasusinggeomorphologicalmethodsthecaseof9august2020euboeagreeceagisbasedapproach |